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Resumen del manual
The monitor will trigger a flow fault if the pressure drop from ambient is less than 0.2 psi during a purge cycle, and 0.5 psi during a measurement cycle. Keypad Functions From the Data Display screen, use the Keypad buttons to place the arrow (>) on the display next to the P-CHK function. Then press ENTER to display the Pressure screen. The Left Arrow Keypad button toggles the purge valve open and closed. Note that an asterisk (.) appears when the purge valve is open (purging). The Down Arrow Keypad button toggles the pump ON and OFF. Pressing the ENTER button stores the current manifold pressure shown on the left to the ambient pressure shown on the right (must be done with the pump OFF). Screen Display 14.72 * AMB14.81 Manifold Pressure . Stored Ambient Pressure 0.09dif <0000> Pressure Difference Fault Code Manifold Pressure – Current manifold pressure in psia. Stored Ambient Pressure – Stored ambient pressure in psia. Pressure Difference – The difference between the current manifold pressure and the stored ambient pressure. Fault Code – Current fault code (Page 19). Purge Valve Asterisk (.) – When viewing the Pressure screen, the purge valve can be opened and closed by pressing the Left Arrow Keypad button. An asterisk appears on the display when the purge valve is open. Instruction 3015-4286 The DIAGNOS Function Overview The DIAGNOS function displays sensor data and status information useful to a service technician for troubleshooting various fault conditions. Explanations of the data shown in these screens are given below. Keypad Functions From the Data Display screen, use the Keypad buttons to place the arrow (>) on the display next to the DIAGNOS function. Then press ENTER to display the first of two Diagnostic screens. Press the Up Arrow Keypad button to toggle between the First and Second Diagnostic screen. First Diagnostic Screen 4.26500v <0000> 24.5cD* 14.72psi Bench Voltage Fault Code Detector Temperature °C . Manifold Pressure 0.00250n <0000> 29.5cB* 14.72psi Noise Fault Code Box Temperature °C . Manifold Pressure In the first diagnostic screen, the user can toggle between displaying the Bench Voltage / Noise and Detector Temperature / Box Temperature by pressing the Right Arrow Keypad button. Bench Voltage – This is the current peak-to-peak output of the IR detector. In the absence of refrigerant this value can range from 3.90000V to 4.50000V. Noise – The Noise value is a 16 point running average of the noise portion of the IR detector’s output. This reading is valuable mainly when refrigerant is NOT present. Detector Temperature – This is the current detector temperature in °C. Box Temperature – This is the current internal enclosure temperature in °C. Fault Code – Current fault code. A value of <0000> indicates that no faults are being detected. Manifold Pressure – Current manifold pressure in psia. Purge Valve Asterisk (.) – The purge valve can be opened and closed by pressing the Left Arrow Keypad button. An asterisk appears on the display when the purge valve is open. Second Diagnostic Screen 0.4ppm 0.00 PPM Level .Mole/Liter 0.00002au*4.260v Avg. Absorption Unit . Detector Voltage PPM Level – Parts Per Million Level is the current detected gas level, and is the volume concentration referenced to standard temperature and pressure. Average Absorption Unit – This is the optical absorbency. In the absence of refrigerant the absorbency is 0.00000 au. When sampling refrigerants, its value varies proportionally with the refrigerant concentration. .Moles/Liter – This is the absolute concentration in micro-moles per liter of refrigerant. Detector Voltage – This is a running average of the IR detector’s bench voltage as displayed in the First Diagnostic screen. Purge Valve Asterisk (.) – When viewing the diagnostic screen, the purge valve can be opened and closed by pressing the Left Arrow Keypad button. An asterisk appears on the display when the purge valve is open. Instruction 3015-4286 The Calibration Function Overview If greater than standard accuracy is desired, the factory’s default calibration factor of 1.000 may be adjusted by performing the calibration procedure as described below, and then selecting the monitor’s CAL function to enter the new calibration factor. IMPORTANT! Changing the calibration factor will VOID the factory calibration. Typically, the monitor will remain within the factory-calibrated accuracy indefinitely and no calibration is required. Complex software algorithms adjust for temperature drift, IR source aging, and pressure changes in order to keep the unit within factory accuracy specifications. Calibration Procedure The calibration factor is determined by sampling a known dilution of ammonia gas. The sample must be prepared to less than half the desired accuracy and the concentration must be corrected for ambient temperature and pressure at the time of measurement. Calibration is best performed at or near full scale, it can however, be done at any concentration and ...